Answer:
He got 5 right
Step-by-step explanation:
10% = 0.1
50(0.1) = 5
Answer:
5 questions were answered correctly
Step-by-step explanation:
10% of 50 is 5. So that means 5 questions were answered correctly.
Which expressions are difference of squares?
Select all correct answers.
y^6 + 25
x^2 − y^2
x^4 − 36
y + 16
Answer:
x² - y² and x^4 - 36
Step-by-step explanation:
(x + y)(x - y)
(x² + 6)(x² - 6)
One method for straightening wire before coiling it to make a spring is called "roller straightening." The article "The Effect of Roller and Spinner Wire Straightening on Coiling Performance and Wire Properties" (Springs, 1987: 27–28) reports on the tensile properties of wire. Suppose a sample of 16 wires is selected and each is tested to determine tensile strength (N/mm2 ). The resulting sample mean and standard deviation are 2160 and 30, respectively. a. The mean tensile strength for springs made using spinner straightening is 2150 N/mm2 . What hypotheses should be tested to determine whether the mean tensile strength for the roller method exceeds 2150? b. Assuming that the tensile strength distribution is approximately normal, what test statistic would you use to test the hypotheses in part (a)? c. What is the value of the test statistic for this data? d. What is the P-value for the value of the test statistic computed in part (c)? e. For a level .05 test, what conclusion would you reach?
Answer:
We accept H₀, we don´t have enough evidence to claim that the procedure improves the tensile strength above the peviuos average
Step-by-step explanation:
Information:
μ = 2150
Sample size n = 16
Sample mean x = 2160
Sample standard deviation s = 30
a) Test Hypothesis
Null Hypothesis H₀ x = μ
Alternative Hypothesis Hₐ x > μ
b) If Tensile strength is approximately normal distribution we should use t-student statistic for testing the above hypothesis.
t(s) = ?? with df = n - 1 df = 15
c) t(s) = ( x - μ ) / s/√n
t(s) = ( 2160 - 2150 ) / 30/√16
t(s) = 10*4 / 30
t(s) = 1,33
d) In t-student we look for p-vale for 1,33 and df = 15
p-value = 0,1
e) If the level of significance is 0,05, then α/2 = 0,025
we compare p-value and level of significance
p-value 0,1 > 0,025
Then p-value is bigger than the significance level, we should accept H₀
Quadrilaterals:
Find the value of x in the figure below:
Answer:
118°
Step-by-step explanation:
The sum of the interior angles of a pentagon is 540
122+98+99+103= 422
540-422= 118
find the value of X round to the nearest 10th
Answer:
x ≈ 80.4
Step-by-step explanation:
Using the tangent ratio in the right triangle
tan15° = [tex]\frac{opposite}{adjacent}[/tex] = [tex]\frac{x}{300}[/tex] ( multiply both sides by 300 )
300 × tan15° = x , then
x ≈ 80.4 ( to the nearest tenth )
5) Abhasra invests $7,053 in a savings
account with a fixed annual interest rate of
3% compounded quarterly. What
will the account balance be after 4 years?
Answer:
After 4 years the account balance will be $ 7,948.67.
Step-by-step explanation:
Given that Abhasra invests $ 7,053 in a savings account with a fixed annual interest rate of 3% compounded quarterly, to determine what the account balance will be after 4 years, the following calculation must be performed:
7.053 x (1 + 0.03 / 4) ^ 4x4 = X
7,053 x 1.0075 ^ 16 = X
7.053 x 1.12699211 = X
7,948.67 = X
Therefore, after 4 years the account balance will be $ 7,948.67.
I need help I needa pass this test all 9 questions
Answer: The answer is b
Step-by-step explanation: Check the image! It matches. Hope this helps!
Two sets of parallel lines intersect as shown. Given ∠2 = 130° what is ∠9?
Answer:
50 degrees. The angle is the opposite of angle 9, making it 180-130=50.
A company makes wax candles in the shape of a cylinder. Each candle has a radius of 3 inches and a height of 2 inches. How much wax will the company need to make 270 candles?
Use 3.14 for pie and do not round your answer.
Answer:
[tex] 15,260.4 \: {in}^{3} [/tex]
Step-by-step explanation:
Radius of candle = 3 inches
Height of candle = 2 inches
Wax needed to make one candle = Volume of one cylindrical candle
[tex] =\pi r^2 h[/tex]
[tex] =3.14(3)^2 (2)[/tex]
[tex] =56.52\: in^3 [/tex]
Volume of wax needed to make 270 candles
[tex] = 270 \times wax\: needed \: to\:make \: one \: candle \\ \\ = 270 \times 56.52 \\ \\ = 15,260.4 \: {in}^{3} [/tex]
What do you know about expressions and equations? What are some examples of expressions and equations? Have you ever thought about what you should do if you don’t know a certain value? Give an example of how you think you should handle that type of situation.
Answer:
Answer: An equations is a number, a variable, or a combination of numbers and variables and operational symbols. An equation is made up of two expressions connected by an equal sign.
Example Expression: 8x+5y-3x-5
Example Equation: 5x-4=x
Step-by-step explanation:
guys please help I need the answer right now
Please help i need to get these right or i fail WILL GIVE BRAINLEST!!!
Answer:
Give brainly to other guy
Step-by-step explanation:he deserves it
True or False:
A figure that translated 4 units
right and 2 units up maintains
it's congruence.
A bean plant grew 1 1/2 inches per day. How much did the plant grow in 9 days?
Answer:
108 Inches
Step-by-step explanation
9 * 12 = 108
Answer:
108
Step-by-step explanation:
9*12=108 is the answer
Find the area 5 3/4 x 9 3/4
Answer:
56.0625
Step-by-step explanation:
5 3/4x 9 3/4=56.0625
Answer:
Area = 7 km x 5 km = 35 km2 ... by either an addition, subtraction, or some other combination of operations to find the required area. ... ½ x base x height ½ x 9 x 4 = 18. Area of rectangle part: width x height 9 x 6 = 54.
Step-by-step explanation:
Christopher is taking a multiple choice test with a total of 100 points available. Each question is worth exactly 2 points. What would be Christopher's test score (out of 100) if he got 10 questions wrong? What would be his score if he got xx questions wrong?
Answer:
If im not wrong, if every question is 2 points of 100 points in total means that are 50 questions, so if he gets 10 wrong then he would be losing 20 points which his final grade would be 80!
Answer:
Score with 10 questions wrong: 80
Score with x questions wrong: 100−2x
Step-by-step explanation:
each point is deducted by 2 pts and so, with 10 question, he got an 80.
100 is the availability of the points and 2x means which the points were lost
What is the right answer
Answer:
The complement of 44° is the angle that when added to 44° forms a right angle ( 90° ). Subtract 44 from 90.
Step-by-step explanation:
What are the next 3 terms in this sequence of terms? 12, 18, 24, 30
12345 :- 987 me pueden ayudar con esta division
Adult tickets to the ice-skating show cost
$34 each plus a $2 handling fee for each
ticket. Senior Tours purchased 87 adult
tickets. How much money did the tour
company pay for the tickets and handling
fees?
A $2,960
B $4,783
C $3,132
D $2,958
Mixture Temperature (°C)
Mixture 1
3
Mixture 2
-4
Mixture 3
-1
Mixture 4
2.
In science class, Emma is measuring the temperature of different chemical mixtures. The temperatures of four
mixtures are shown in the table. Which mixture's temperature is closest to zero?
Answer:
c
Step-by-step explanation:
sheeesh 3 easy
HELP please with this
Answer:
CB = 9
Step-by-step explanation:
To find CB, apply trigonometric function.
Reference angle = 60°
Hypotenuse = 18
Adjacent = CB
Apply CAH:
Cos 60 = Adj/Hyp
Cos 60 = CB/18
Cos 60 × 18 = CB
CB = Cos 60 × 18
CB = 9
1. It takes one week for a crew of workers to pave 35 kilometer of a road. At that rate, how long will it take to pave 1 kilometer?
Write a multiplication equation and a division equation that represent the question and then answer the question.
Answer:
5/3
Step-by-step explanation:
A salesperson earns a commission of $252 for selling $2100 in merchandise.
Find the commission rate. Write your answer as a percentage.
Answer:
The commission rate is of 12%.
Step-by-step explanation:
Commission rate:
The commission rate is given by the commission value multiplied by 100% and divided by the value of merchandise sold.
In this question:
$252 in commission for selling $2100 in merchandise. So
252*100%/2100 = 12%
The commission rate is of 12%.
Help me i need help pls
Answer:
x-variable
5x-term
5-coefficient
12-constant
Answer:
Dababy A baby. (=
Please help.
You will get brainliest.
Answer:
number 3 if not 3 than ldk
what is 6/11 - 9/2
Answer:
3 and 21/22
Step-by-step explanation:
You convert the fractions so they have the same number as the denominator and then subtract them.
At Ralphs Italian Ices, 145 sundaes were sold in June. Sales were up 23% in July, How many sundaes were sold in July?
Yare Yare daza
ORAORAORAORAORAORAORAORA!!!!!
Answer:
Wonderfully put, bravo
Step-by-step explanation:
Answer:
(jotaro) "yare yare daze"
Step-by-step explanation:
(star platinum)
"ORA ORA ORA ORA ORA ORA ORA ORA ORA ORA ORA ORA ORA ORA ORA ORA ORA ORA ORA ORA ORAORA ORA ORA ORA ORA ORA ORAORA ORA ORA ORA ORA ORA ORAORA ORA ORA ORA ORA ORA ORAORA ORA ORA ORA ORA ORA ORAORA ORA ORA ORA ORA ORA ORAORA ORA ORA ORA ORA ORA ORAORA ORA ORA ORA ORA ORA ORAORA ORA ORA ORA ORA ORA ORAORA ORA ORA ORA ORA ORA ORAORA ORA ORA ORA ORA ORA ORAORA ORA ORA ORA ORA ORA ORAORA ORA ORA ORA ORA ORA ORAORA ORA ORA ORA ORA ORA ORAORA ORA ORA ORA ORA ORA ORAORA ORA ORA ORA ORA ORA ORAORA ORA ORA ORA ORA ORA ORAORA ORA ORA ORA ORA ORA ORAORA ORA ORA ORA ORA ORA ORAORA ORA ORA ORA ORA ORA ORAORA ORA ORA ORA ORA ORA ORAORA ORA ORA ORA ORA ORA ORAORA ORA ORA ORA ORA ORA ORAORA ORA ORA ORA ORA ORA ORAORA ORA ORA ORA ORA ORA ORAORA ORA ORA ORA ORA ORA ORAORA ORA ORA ORA ORA ORA ORAORA ORA ORA ORA ORA ORA ORAORA ORA ORA ORA ORA ORA ORAORA ORA ORA ORA ORA ORA ORAORA ORA ORA ORA ORA ORA ORAORA ORA ORA ORA ORA ORA ORAORA ORA ORA ORA ORA ORA ORA
yare yare
ORA ORA ORA ORA ORA ORA ORAORA ORA ORA ORA ORA ORA ORA ORA ORA ORA ORA ORA ORA ORA ORA ORA ORA ORA ORA ORA ORA
OOOOOOOOORA!
HElp And thaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaanks
Answer:
C or A
But I pick A
Step-by-step explanation:
Answer:
best option is A
Step-by-step explanation:
State the quadrant or axis the point lies in (9, -10)
